840487242 has 32 divisors (see below), whose sum is σ = 2034122112. Its totient is φ = 226013184.

The previous prime is 840487231. The next prime is 840487243. The reversal of 840487242 is 242784048.

It is a self number, because there is not a number n which added to its sum of digits gives 840487242.

It is not an unprimeable number, because it can be changed into a prime (840487243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 587863 + ... + 589290.

It is an arithmetic number, because the mean of its divisors is an integer number (63566316).

Almost surely, 2^840487242 is an apocalyptic number.

840487242 is an abundant number, since it is smaller than the sum of its proper divisors (1193634870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

840487242 is a wasteful number, since it uses less digits than its factorization.

840487242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177182.

The product of its (nonzero) digits is 114688, while the sum is 39.

The square root of 840487242 is about 28991.1579968790. The cubic root of 840487242 is about 943.7211940274.

The spelling of 840487242 in words is "eight hundred forty million, four hundred eighty-seven thousand, two hundred forty-two".